Duplex driving mechanism



June 17 1924.

E. A. RYDER DUPLEX DRIVING MECHANISM Filed Feb. 28, 1923 lll" I| Ill' IIIII Illlll Y ATTORNEY Patenten June! 17,1924;

Nrn-'Eo STATES PATENT oF-Flcnl f `EARLIE A. RYDER, OF KEYPORT, NEW JERSEY,` ASSIGNOR TO 'AEROMARINE PLANE MOTOR COMPANY, A CORPORATION OF NEW YORK.

DUPLEX DRIVING MECHANISM.

- Application filed-February 28, 1923. Serial No. (i21,815.

To all whom t may concern:

Be it known that I, EARLE A. RYDER, a citizen of the United States,y and a resident of Keyport, in the county of Monmouth and State of New Jersey, have invented certain new and useful Improvements in Duplex Driving Mechanism, of which the following is a specification, reference being had to the accompanying drawings, forming part of this specification.

This invention relates in general to an improved form of driving mechanism for accessories such as are usually associated with an internal combustion engine, and applies more specifically to aircraft engines although i not confined thereto. It specially aims at an improved manner in which an engine-driven accessory suchl as a fuel pump may be operated manually or from another source such as a starting motor when the engine is at rest just prior to its being started. f

rlhe present embodiment and its specific application as herewith illustrated characterizes a driving mechanism havingnovel and improved features in which the mech-- anism is so constituted as to provide a simple means in a most compact form for manually or otherwise operating an engine-driven fuel pump when it is desirable to supply asmall amount of lfuel to the engine for starting purposes, the driving elements featured in this invention being so formed and so disposed relatively to one'another as to automatically mesh or demesh when one or the other ofthe driving means is functioning, thus insuring against fracture orjammin of the parts, as will-be more fully described hereinafter.

Another feature of this invention is the construction and its mode of operation so as to permit of the manual or othef driving meansl being placed in a position remote from thatof the pump or-'in an accessible orconvenient location' and Ithe .pump v operated thereby without resorting to a complex mechanismof intermediate gears or other driving means.

A further feature of this invention consists in providing a device in which the construction is such as to avoid constantly contactin latches or ratchets which are noisy "and su ject to much wear, in the present construction the enga ing elements are such as t0 permit Ot than; sieg entirely free of 0.1.19

another when moved to a disengaged position.

rlhe pump as herein shown is ofa conventional type well known to those skilled in the art, and is not in itself a feature of this invention, furthermore, it is to be understood' that the driving mechanism disclosed in this instance is not confined to the operation of a fuel pump exclusively, it being obvious that the same is applicable with slightfmodifcation to other devices not shown or described herein.

A suitable mechanism is-herei rovided for an engine-driven accessory in w ich the accessory may be driven manually 'or otherwise at a point remote therefrom, as by flexible driving connection and in which the automatic meshing of said manual or alternative driving means with the driven means may be Vaccomplished by the rotation of the driving means, said meshing and demeshing features lbeingso constituted that the two distinct driving means cannot coact to simultaneously drive the accessory associated therewith.

Various otherobjects and advantages of the invention will be in part obvious from an inspection of the accompanying drawings and in part will be more fully set forth in the following particular description of one form of mechanism embodying my invention, and the invention also consists in certain new and novel features of construction and combination. `1 ln the drawings Figure 1 is a vertical longitudinal section of the invention taken approximately in the center. f t

Figure 2 is a fragmentary sectional view similar to'Fig. 1 showingAV the elements in another position.

In the present instance 10 designates a housing which is attached to an engine in any suitable manner and in which the prin- The gear 12 is disposed between the shoulder 15 and the clutch teeth 17 so as to permit of it having an axial movement therebetween. Secured to the shaft 14 is a spur gear 20 meshing with one or more similar gears (not shown) which constitutes the fuel pumping means, said fuel being drawn through an inlet tube 23 and expelled throu'gh the outlet tube 24 due to the rotation of said gears in a manner well understood.

In a cylindrical extension 26 there isl disposed an auxiliary shaft 27, axially alignedv with the shaft 14 and having an enlarged end portion 28. Upon the 4portion 2 8 there is mounted in a manner so as'to be slidable thereon, a sleeve member 29 having angular clutch teeth 31 adjacent to the clutch teeth 18 and adapted to engage the same. One or more (as may be found convenient) angular slots 32 are formed in the sleeve, said slots coacting with one or more pins 33 secured in the enlarged end portion 28, the ends of said pins projecting outward in a manner so as to engage in the slots 32.

To the shaft 27 there is secured in any suitable manner a exible shaft 34 said fiexible shaft being connected to a g'ear drive '35, 36 contained in a housing 37 and op.- erated in this `instance by a hand crank 38.

The housing 37 may be secured to the engine as by screws 39 in any convenient and accessible location from the main portion of the mechanism.

In operation, and assuming the elements 35 in the positions occupied while the engine is at rest as shown in` Fig. 1; when it is desired to supply a quantity of fuel to the engine for starting purposes, the hand crank 38 o'r alternative driving means is rotated in 40 a clock-wise direction thereby operating the gear drive 35, 36 which in turn drivesthe fiexible shaft 34 connected to the shaft 27 and which is thereby likewise rotated; as the shaft 27 starts to rotate, the sleeve 29 will be moved axially into mesh with the sleeve 16 due to the angular slots 32 and the action of the pins33 -thereagainst, to 'a position as shown in Fig. 2. The initial axial movement having been completed, the sleeves 16 and 29 and the shaft 14 will be caused to rotate and the-pump operated; said rotation will effect `a vdemeshing action of the clutch teeth .13 and 17 due to the angularity of the same and slide the gear 12 over; against the shoulder 15 where it will not obstruct the rotation of the shaft 14.

It is obvious that thealternative driving means such as a hand crank or other power device can be connected directly to the end of the shaft 27 .and adjacent to the mechanism when it is so desired.

With reference to Fig..1, when the engine has started up under its own power the frictional contact of the gear 11 against the gear 5" 12 {dlrection of rotation as indicated by the i arrows) will be sufficient to force the gear of the intermediate sleeve member 16, thus4 providing a quiet running ,mechanism .in which c'lattering and fast wearing ratchets and latches have been avoided.

Variations may be resorted to within the scope of the invention and portions of the 'improvements may be used without lthe others whilst not departing from the spirit of the invention.

Having thus described my invention, I

- claim 1. An engine accessory driving mechanism each driven from one of said sources ofv power, a fixed member on the shaft adapted rto be engaged by any one `4of said slldable members one at a time.,

3. A device of the character described,

com rising, a shaft to be driven, a plurality of riving means adapted to operate said shaft, a member fixed on the shaft and adapted to be engaged on either side by one of -said driving means to drive the' same, said member so' constituted as to be l engaged by the one of said driving meanshaving rotational speed in excess of the others.

4. In a driving mechanism for an engine accessory, a shaft to be driven from the engine to operate said accessory, an alterna# tive driving means therefor, means comprising members on the shaftadapted by being axially slidable thereon to automatically effect a disengagement of one of said driving means when the other of said driving means is operating thel shaft.

5. A driving mechanism for anengine accessory, comprising, a shaft to be drlven from the engine" to operate said accessory, an alternative driving means located at a point remote from the accessory and adapted to drive the' same when the engine 1s at rest, a fixed meinber'on the shaft having two engaging faces and adapted t9 be engaged 1n a manner as to be driven .from either the engine or the alternative driving means.

6. In an engine accessory driving mechanism, the ,combination of a plurality of driving means, a device to be driven, a driving connection therefor adapted to be engaged by any one of said driving means to operate the same, one of said driving means adapted to permit of it being located at a point remote from said device, and separable clutch means axially slidable for automatically disengaging the other of said driving means when the rotational speed of one'of said means exceeds the other.

7. In a device of the class described, a plurality of driving means, a device to be driven thereby, one of said .driving means being located at a point remote from the other of said means, a flexible driving connection associated therewith to drive the device, and means comprising an axially slidable and vseparable connection adapted to automatically disengage the other of said ydriving means when one of said means is functioning.

8. yIn an internal combustion engine, the combination of a'device to'be driven thereby, an auxiliary driving means therefor to be operated when the engine is at rest, a drive shaft for saidk device, an axially shiftable gear on the drive shaft driven from the enf,

gine'and adapted to engage the shaft to rotate the same, means ada ted to engage the shaft to rotate the same rom the auxiliary driving means when the engine is at rest, said means so constituted as to eEect a disengagement of the shiftable gear when so operated, and further adapted to disengage the auxiliary driving/means when the engine is functioning.

9. A driving mechanism comprising a device to be driven, a drive shaft therefor, a shiftable gear thereon having means adapted to engage the shaft to drive the same, a first driving means, a second driving means, the -first of said driving means associated with the shiftable gear and adapted to effect an engagement thereof with the drive shaft, a

1 shiftable member associated with the second said driving means and adapted to engage the shaft to drive the same, and means so constituted as to e'ect a disengagement of either one of said driving means when the -rotational speed of bnc exceeds the other.

10. In a device of the class described, the combination of an engine having a drive lshaft with a gear thereon, an y accessory by the yfirst gear and having means on the' side thereof adapted t0 engage said 'fixed member on the shaft to drive the same when y l1'. In a device of the class described, the

combination of an engine having a drive shaft with a gear thereon, an accessory adapted to be attached to the engine, a drive shaft for said accessory, a xed member on the accessory shaft, an auxiliary shaft coaxial with the accessory shaft, an axially shiftable gear mounted for free rotation on the drive shaft, said gear driven by the first A,gear and having means on the side thereof ada ted to engage the fixed member on the sha t to drive the same when the engine is operating, a subordinate driving means located adjacent to said accessory and attached to said auxiliary shaft, a shiftable Vmember associated With the auxiliary shaft, said member having means adapted to engage said fixed member on the drive shaft in a manner so as to rotate the same and other means so constituted as to permit of the accessory being driven by that one of said means Whose rotational speed is predom-` inant.

12. A. device of the character described shaft axially aligned therewith, a vmember on the auxiliary shaft adapted to be automatically advanced so as to engage the main shaft When the first said driving means is functioning, a gear mounted for free rotation on the main shaft and associated with the second said driving means, means on the gear adapted to engage the main shaft to drive the same when the second said driving means is functioning. l

13. In apparatus of the class described, a plurality of driving means, a driven means, a drive shaft for said driven means, a fixed means on the drive shaft'to be connected to any one of said driving means to drive the same, shiftable means associated with the drive shaft adapted to axially slide into operative or inoperative positions with said fixed means in a manner so that said drive shaft can be operated by only one of said driving means at one time.

.14. In an accessory for. an internal combustion engine, a drive shaft for said accessory 'an axiallyshiftable gear on the Shaft and operated by the engine, said gear adapted to be shifted so as to engage the shaft 1 n a drivable manner when the engine 1s started, an auxiliary driving means for theaccessory, when the engine is at rest, means automatically operative to engage the shaft in`a drivable manner by the auxiliary driving means, said means also adapted to effect a disengagement ofthe gear from the shaft.

15. A device alternatively operable from several sources of power comprising a drive shaft having engaging means thereon, a pair of members individually drivable and axially slidable on the shaft by a source of power and adapted to nonconcomitantly engage the same.

16 A device for operating` an engine accessory from either one of two sources of power comprising .a shaft drivably connected to an accessory, a driving connection including a pair of members axially slidable on the l shaft, clutch means on the shaft adapted to be engaged by one of the slidable members having a driving connection with the engine, said clutch means also adapted .to be engaged by the other slidable member operated by a driving means other than said engine, said clutch means so constituted as to release by axial movement one of said members when the rotational speed thereof is less than the other 17. A power transmitting device adapted to transmit power from either one of two sources comprising a meansl to be driven, a

shaft to drive the same, means on the shaft adapted to be engaged bysan axially shiftable member having a driving connection y y'with a prime mover, said'means also adapted to be engaged by an axially shiftable member operable by a force other than said prime mover, said means'so constituted as to release by axial movement one of said members when the rotational speed thereof becomes less than the other.

L adapted to engage the ixed member, said 18. In apparatus of the class described,

ythe combination of a means tol be driven, a

pluralit of driving means, a shaft to be driven rom said means, a fixed member on the shaft, en agin means on said member, a gear axia y shiftable on the shaft and gear operated from one of said driving means andadapted to be shifted into enagement when so operated, an auxiliary s aft axially aligned with the aforesaid shaft-and operated from one of said driving means, a slidable member on the auxiliary shaft, engaging means on the slidable member adapted to engage the fixed member, means on the auxilla shaft adapted to advance the slidable meriiher to engage the fixed member when the shaft is operated,

said engaging means on the shiftable gear and the yslidable member so constituted as to lbeqonm eectve .only when the rotational -speed of the driving means associated therewith is'in excess of the other.-

19. In a device ofthe class described, the

drive shaft when said gear is shifted by the driving means, an auxiliary shaft operated by another of said driving means, a shiftable clutch member on the auxiliary shaft adapted when rotated to engage the drive shaft, all of said members so constituted as to eect a release of the drive shaft .from any of said driving means and to maintain a driving relation only with the driving means that excels in rotational spee 20. The combination with an engine and a fuel pump driven from said engine, of a fuel pump drive shaft, a clutch member secured to the shaft, an engine driven gear having a clutch face and axially shiftable on the shaft into engagement with the clutch member when the engine is operat.

ing, angauxiliary shaft adapted to be manually driven, a member having a clutch face and axially shiftable on the auxiliary shaft so as to engage with or disengage from the clutch member, automatic means responsive to the manual driving, means to effect the shifting of both the gear and said shiftable member when the engine is at rest in a manner so that ,said fuel pump shaft can be manually operated.

21. The combination with an engine and a fuel pump driven from said engine, of a fuel pump drive shaft, a gear axially shiftable ,on the shaft and driven from the engine, clutch means on the gear, a' double faced clutch member on the shaft, said gear adapted to drivably engage one of the clutch faces when the engine is operating, an auxiliary shaft axially aligned with the fuel pump drive shaft and adapted to be manually driven, a member rotatable with and axially shiftable on the auxiliary shaft, said member adapted to drivably engage the other of said clutch faces when axially shifted, a means to shift said member when the shaft is operated said means comprising `one or more angular slots in the member and pins in the auxiliary shaft to engage the slots,said clutch member so constituted as to release the fuel pump shaft from either one of .said driving means and to be engaged and driven only by the one vhaving the higher rotational speed.

22. The combination with an engine and an accessory driven from said engine, of an accessory drive shaft, a gear axially shiftabl on the shaft and driven from the engine, clutch means on the gear, a double faced clutch member on the shaft, said gear adapted to engage one of the clutch 'faces when the engine is operating, an auxiliary Shaft axially aligned with the accessory drive shaft and adapted to be driven from a source ol power other than said engine, a member rotatable With and axially shiftable on the auxiliary shaft, said member adapted to engage the other of said clutch faces when axially shifted, a means to shift said member when said power is operated and comprising one or more angular slots in the member and pins in the auxiliary shaft to engage the slots, said-clutch` member so constituted as to release the accessory shaft from either one of said driving means and tobe engaged and driven only by the one having the higher rotational speed.

23. In a device adapted to operate a driven means from either one of two driving means, an "automatic axially slidable driving connertion between Said driving and driven. means including an intermediate non-sliolable member adapted to maintain a 'driving relation with only one of said driv- EARLE A. ,RYDER 

